diff --git a/lib/default.nix b/lib/default.nix
index 65edd68..37c59d9 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -109,7 +109,7 @@ rec {
     matchConfig.Name = iface;
     address =
       [ "${a.ipv4.address}/${toString a.ipv4.mask}" ] ++
-      (optional (a.ipv6.iid == null) "${a.ipv6.address}/${toString a.ipv6.mask}");
+      (optional (a.ipv6.address != null && a.ipv6.iid == null) "${a.ipv6.address}/${toString a.ipv6.mask}");
     gateway =
       (optional (a.ipv4.gateway != null) a.ipv4.gateway) ++
       (optional (a.ipv6.gateway != null) a.ipv6.gateway);
@@ -223,6 +223,7 @@ rec {
         v4 = "${start.all.v4}3.";
         v6 = "${start.all.v6}3::";
       };
+      vip1 = "94.142.241.22";
     };
     prefixes = {
       all = {
@@ -242,6 +243,7 @@ rec {
         v4 = "${start.oci.v4}0/24";
         v6 = "${start.oci.v6}/64";
       };
+      vip1 = "${start.vip1}4/30";
     };
   };
   sshKeyFiles = {
diff --git a/nixos/boxes/colony/default.nix b/nixos/boxes/colony/default.nix
index ac14881..f6b0228 100644
--- a/nixos/boxes/colony/default.nix
+++ b/nixos/boxes/colony/default.nix
@@ -7,10 +7,20 @@
     home-manager = "mine-stable";
 
     assignments = {
+      routing = {
+        name = "colony-routing";
+        domain = lib.my.colony.domain;
+        ipv4.address = "${lib.my.colony.start.base.v4}2";
+      };
       internal = {
         altNames = [ "vm" ];
         domain = lib.my.colony.domain;
-        ipv4.address = "${lib.my.colony.start.base.v4}2";
+        ipv4 = {
+          address = "${lib.my.colony.start.vip1}4";
+          mask = 32;
+          gateway = null;
+          genPTR = false;
+        };
         ipv6 = {
           iid = "::2";
           address = "${lib.my.colony.start.base.v6}2";
@@ -145,7 +155,10 @@
             };
 
             networks = {
-              "80-base" = networkdAssignment "base" assignments.internal;
+              "80-base" = mkMerge [
+                (networkdAssignment "base" assignments.routing)
+                (networkdAssignment "base" assignments.internal)
+              ];
               "80-base-dummy" = {
                 matchConfig.Name = "base0";
                 networkConfig.Bridge = "base";
@@ -173,21 +186,29 @@
                   ];
                   routes = map (r: { routeConfig = r; }) [
                     {
-                      Gateway = allAssignments.shill.internal.ipv4.address;
                       Destination = lib.my.colony.prefixes.ctrs.v4;
+                      Gateway = allAssignments.shill.routing.ipv4.address;
                     }
                     {
-                      Gateway = allAssignments.shill.internal.ipv6.address;
                       Destination = lib.my.colony.prefixes.ctrs.v6;
+                      Gateway = allAssignments.shill.internal.ipv6.address;
+                    }
+                    {
+                      Destination = allAssignments.shill.internal.ipv4.address;
+                      Gateway = allAssignments.shill.routing.ipv4.address;
                     }
 
                     {
-                      Gateway = allAssignments.whale2.internal.ipv4.address;
                       Destination = lib.my.colony.prefixes.oci.v4;
+                      Gateway = allAssignments.whale2.routing.ipv4.address;
                     }
                     {
-                      Gateway = allAssignments.whale2.internal.ipv6.address;
                       Destination = lib.my.colony.prefixes.oci.v6;
+                      Gateway = allAssignments.whale2.internal.ipv6.address;
+                    }
+                    {
+                      Destination = allAssignments.whale2.internal.ipv4.address;
+                      Gateway = allAssignments.whale2.routing.ipv4.address;
                     }
                   ];
                 }
diff --git a/nixos/boxes/colony/vms/estuary/bgp.nix b/nixos/boxes/colony/vms/estuary/bgp.nix
index c3109be..baaa804 100644
--- a/nixos/boxes/colony/vms/estuary/bgp.nix
+++ b/nixos/boxes/colony/vms/estuary/bgp.nix
@@ -13,8 +13,12 @@ in
         # TODO: Clean up and modularise
         config = ''
           define OWNAS = 211024;
+
+          define CCVIP1 = ${lib.my.colony.prefixes.vip1};
+
           define OWNIP4 = ${assignments.internal.ipv4.address};
           define OWNNETSET4 = [ ${assignments.internal.ipv4.address}/32 ];
+          define CCNETSET4 = [ ${lib.my.colony.prefixes.vip1} ];
 
           define INTNET6 = ${intnet6};
           define AMSNET6 = ${amsnet6};
@@ -29,15 +33,14 @@ in
           define PREFIXP = 110;
           define PREFPEER = 120;
 
-          #function should_export6() {
-          #	return net ~ OWNNETSET6 || (transit && net ~ TRANSSET6);
-          #}
-
           filter bgp_import {
-            if net !~ OWNNETSET6 then accept; else reject;
+            if net !~ OWNNETSET4 && net !~ OWNNETSET6 then accept; else reject;
           }
           filter bgp_export {
-            if net ~ OWNNETSET6 then accept; else reject;
+            if net ~ OWNNETSET4 || net ~ OWNNETSET6 then accept; else reject;
+          }
+          filter bgp_export_cc {
+            if net ~ OWNNETSET4 || net ~ OWNNETSET6 || net ~ CCNETSET4 then accept; else reject;
           }
 
           router id from "wan";
@@ -48,11 +51,20 @@ in
             ipv4;
             ipv6;
           }
-          protocol static {
+          protocol static static4 {
+            route CCVIP1 via "base";
+
+            ipv4 {
+              import all;
+              export none;
+            };
+          }
+          protocol static static6 {
             # Special case: We have to do the routing on behalf of this _internal_ next-hop
             route INTNET6 via "as211024";
             route AMSNET6 via "base";
             route HOMENET6 via DUB1IP6;
+
             ipv6 {
               import all;
               export none;
@@ -161,10 +173,12 @@ in
           protocol bgp upstream4_coloclue_eun2 from upstream_bgp4 {
             description "ColoClue euNetworks 2 (IPv4)";
             neighbor 94.142.240.253 as 8283;
+            ipv4 { export filter bgp_export_cc; };
           }
           protocol bgp upstream4_coloclue_eun3 from upstream_bgp4 {
             description "ColoClue euNetworks 3 (IPv4)";
             neighbor 94.142.240.252 as 8283;
+            ipv4 { export filter bgp_export_cc; };
           }
 
           protocol bgp upstream6_coloclue_eun2 from upstream_bgp6 {
diff --git a/nixos/boxes/colony/vms/estuary/default.nix b/nixos/boxes/colony/vms/estuary/default.nix
index 55fd0ee..a85236e 100644
--- a/nixos/boxes/colony/vms/estuary/default.nix
+++ b/nixos/boxes/colony/vms/estuary/default.nix
@@ -282,15 +282,20 @@ in
                       }
                     ];
                     routes = map (r: { routeConfig = r; }) (flatten
-                      ([  ] ++
+                      ([
+                        {
+                          Destination = lib.my.colony.prefixes.vip1;
+                          Gateway = allAssignments.colony.routing.ipv4.address;
+                        }
+                      ] ++
                       (map (pName: [
                         {
-                          Gateway = allAssignments.colony.internal.ipv4.address;
+                          Gateway = allAssignments.colony.routing.ipv4.address;
                           Destination = lib.my.colony.prefixes."${pName}".v4;
                         }
                         {
-                          Gateway = allAssignments.colony.internal.ipv6.address;
                           Destination = lib.my.colony.prefixes."${pName}".v6;
+                          Gateway = allAssignments.colony.internal.ipv6.address;
                         }
                       ]) [ "vms" "ctrs" "oci" ])));
                   }
diff --git a/nixos/boxes/colony/vms/estuary/dns.nix b/nixos/boxes/colony/vms/estuary/dns.nix
index 309ce46..49df046 100644
--- a/nixos/boxes/colony/vms/estuary/dns.nix
+++ b/nixos/boxes/colony/vms/estuary/dns.nix
@@ -143,11 +143,11 @@ in
                       allAssignments)))
                   assignments)));
 
-        genFor = [ "internal" "base" "vms" "ctrs" ];
+        genFor = [ "internal" "base" "vms" "ctrs" "routing" ];
         intRecords =
           genRecords genFor (a: ''
             ${a.name} IN A ${a.ipv4.address}
-            ${a.name} IN AAAA ${a.ipv6.address}
+            ${optionalString (a.ipv6.address != null) "${a.name} IN AAAA ${a.ipv6.address}"}
             ${concatMapStringsSep "\n" (alt: "${alt} IN CNAME ${a.name}") a.altNames}
           '');
         intPtrRecords =
@@ -162,7 +162,7 @@ in
             genFor
             (a:
               optionalString
-                a.ipv4.genPTR
+                (a.ipv6.address != null && a.ipv6.genPTR)
                 ''@@PTR:${a.ipv6.address}:${toString ptrDots6}@@ IN PTR ${a.name}.${config.networking.domain}.'');
 
         wildcardPtrDef = ''IN LUA PTR "createReverse('ip-%3%-%4%.${config.networking.domain}')"'';
diff --git a/nixos/boxes/colony/vms/shill/default.nix b/nixos/boxes/colony/vms/shill/default.nix
index 8a0735e..5f22db4 100644
--- a/nixos/boxes/colony/vms/shill/default.nix
+++ b/nixos/boxes/colony/vms/shill/default.nix
@@ -6,11 +6,21 @@
     nixpkgs = "mine";
 
     assignments = {
+      routing = {
+        name = "shill-vm-routing";
+        domain = lib.my.colony.domain;
+        ipv4.address = "${lib.my.colony.start.vms.v4}2";
+      };
       internal = {
         name = "shill-vm";
         altNames = [ "ctr" ];
         domain = lib.my.colony.domain;
-        ipv4.address = "${lib.my.colony.start.vms.v4}2";
+        ipv4 = {
+          address = "${lib.my.colony.start.vip1}5";
+          mask = 32;
+          gateway = null;
+          genPTR = false;
+        };
         ipv6 = {
           iid = "::2";
           address = "${lib.my.colony.start.vms.v6}2";
@@ -99,7 +109,10 @@
               };
 
               networks = {
-                "80-vms" = networkdAssignment "vms" assignments.internal;
+                "80-vms" = mkMerge [
+                  (networkdAssignment "vms" assignments.routing)
+                  (networkdAssignment "vms" assignments.internal)
+                ];
                 "80-ctrs" = mkMerge [
                   (networkdAssignment "ctrs" assignments.ctrs)
                   {
diff --git a/nixos/boxes/colony/vms/whale2/default.nix b/nixos/boxes/colony/vms/whale2/default.nix
index 3ba1e8a..a4379cb 100644
--- a/nixos/boxes/colony/vms/whale2/default.nix
+++ b/nixos/boxes/colony/vms/whale2/default.nix
@@ -8,11 +8,21 @@ in
     nixpkgs = "mine";
 
     assignments = {
+      routing = {
+        name = "whale-vm-routing";
+        domain = lib.my.colony.domain;
+        ipv4.address = "${lib.my.colony.start.vms.v4}3";
+      };
       internal = {
         name = "whale-vm";
         altNames = [ "oci" ];
         domain = lib.my.colony.domain;
-        ipv4.address = "${lib.my.colony.start.vms.v4}3";
+        ipv4 = {
+          address = "${lib.my.colony.start.vip1}6";
+          mask = 32;
+          gateway = null;
+          genPTR = false;
+        };
         ipv6 = {
           iid = "::3";
           address = "${lib.my.colony.start.vms.v6}3";
@@ -144,7 +154,10 @@ in
               };
 
               networks = {
-                "80-vms" = networkdAssignment "vms" assignments.internal;
+                "80-vms" = mkMerge [
+                  (networkdAssignment "vms" assignments.routing)
+                  (networkdAssignment "vms" assignments.internal)
+                ];
               };
             };
 
diff --git a/nixos/default.nix b/nixos/default.nix
index 017ef71..719368a 100644
--- a/nixos/default.nix
+++ b/nixos/default.nix
@@ -107,7 +107,7 @@ let
         genPTR = mkBoolOpt' true "Whether to generate a PTR record.";
       };
       ipv6 = {
-        address = mkOpt' str null "IPv6 address.";
+        address = mkOpt' (nullOr str) null "IPv6 address.";
         mask = mkOpt' ints.u8 64 "Network mask.";
         iid = mkOpt' (nullOr str) null "SLAAC static address.";
         gateway = mkOpt' (nullOr str) null "IPv6 gateway.";
@@ -193,7 +193,7 @@ in
           (map
             (as:
               map
-                (a: [ a.ipv4.address a.ipv6.address ])
+                (a: [ a.ipv4.address ] ++ (optional (a.ipv6.address != null) a.ipv6.address) )
                 (attrValues as))
             (attrValues allAssignments));
       dupIPs = duplicates assignedIPs;